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An octagon has 16 diagonals.
5
8
0.5*(82-24) = 20 diagonals
Depends on the shape.
If all of the diagonals are drawn from a vertex of an octagon, how many triangles are formed
it really isn't hard 5
5 triangles are formed.
An octagon has 16 diagonals.
16 diagonals* * * * *5. To all vertices except itself and one each on either side.
40
5
8
0.5*(82-24) = 20 diagonals
It is 18 diagonals
A diagonal of a polygon is a segment drawn from one vertex to another non-adjacent vertex in a polygon. This leaves 32 diagonals that can be drawn from one vertex in a 35 sided polygon.
3